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Feasibility of a Common Electrolyzer for Space Station Freedom
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English
Abstract
The Baseline Space Station Freedom architecture calls for separate and independent water electrolysis subsystems in ECLSS and in Propulsion. A study to assess the potential benefits and impacts of electrolyzer commonality evaluated fifteen sets of ECLSS and Propulsion architectural options with graduated levels of commonality, first by quantifying the electrical power, weight, volume, and heat rejection requirements; and then qualitatively according to safety and redundancy, reliability and maintainability, integration and verification, and assembly. There were no compelling quantitative or qualitative advantages of the options incorporating commonality which would drive a decision to alter the Baseline. The options were also compared with respect to estimated program costs. The maximum projected savings were less than five per cent, likely within the uncertainty of the estimation process. The overall conclusion reached was that the Baseline, of independent unit design and subsystem architectures, should be retained.
Authors
Citation
Sargent, D. and Schmidt, G., "Feasibility of a Common Electrolyzer for Space Station Freedom," SAE Technical Paper 891484, 1989, https://doi.org/10.4271/891484.Also In
References
- Sargent, Donald H. Schmidt George R. “Feasibility of a Common Electrolyzer” Final Report for Study No. 3-06A Space Station Freedom Program Support Contract (PSC), Distributed Systems Branch December 15 1988
- Fortunato, Fred A. Burke Kenneth A. Life Systems, Inc. “Static Feed Electrolyzer Technology Advancement for Space Application” SAE Paper 871450
- Larkins, J.T. Wagner R.C. Gopikanth M.L. Life Systems, Inc. “A Space Station Utility - Static Feed Electrolyzer” SAE Paper 860920
- Schubert, F.H. “Selection of Electrolytes for Electrolysis Cells: Alkaline or Acid” ASME Space Technology and Heat Transfer Conference Los Angeles June 21-24 1970
- F. Schubert of Life Systems, Inc. Reston VA March 11 1988 “Water Electrolysis for Space Station”
- Technical Briefing (with handouts) given to D. Sargent and T. Godwin of PSC Schubert F. Fortunato F. Wagner R. Day L. Life Systems, Inc. Cleveland, Ohio April 28 1988
- Telephone conversation between D. Sargent of PSC and F. Fortunato of Life Systems, Inc. May 12 1988
- Trip by T. Godwin of PSC to Hamilton Standard Windsor Locks CT March 8 1988
- Sansavero V. et al. Hamilton Standard at meeting of Fluid Management System Working Group Reston VA March 10 1988 “Hamilton Standard SPE Electrolyzer Background” “Hamilton Standard SPE Electrolyzer Commonality”
- Telephone conversations and facsimile transmissions between D. Sargent and R. Goalwin of PSC, and V. Sansavero of Hamilton Standard March 21-23 May 13 1988
- Hamilton Standard handouts “SPE Fuel Cell/Electrolysis Capabilities for NASA Applications, 1988” “Status of High Pressure Water Electrolysis, 1988”
- “Oxygen-Hydrogen Propulsion Safety Trade Study: Solid Acid Electrolyzer vs. Liquid Caustic Electrolyzer” United Technologies Corporation, Hamilton Standard Division June 1988